Threat Guide
Ransomware Attacks on SMBs — How to Assess & Reduce Your Risk
Ransomware encrypts your files or systems and demands payment for the decryption key. For SMBs, ransomware is existential — 60% of small businesses that suffer a ransomware attack close within 6 months. Attackers specifically target businesses with cyber insurance, inadequate backups, and time-sensitive operations like healthcare, legal, and financial services.
88%
of SMB data breaches involve ransomware as the attack vector
Verizon 2025 DBIR
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How Ransomware Works — Step by Step
- Initial access: phishing email with malicious attachment or link (most common), exposed RDP, or compromised credentials
- Persistence: attackers often wait 2–14 days after initial access before deploying ransomware
- Lateral movement: spreading across network to maximize encryption coverage
- Data exfiltration: stealing data before encryption to enable double-extortion ("pay or we publish")
- Encryption: deploying ransomware to encrypt files, databases, and backups
- Ransom demand: note left on encrypted systems with payment instructions (typically $50K–$3M for SMBs)
Ransomware Impact on SMBs
Ransomware SMB Impact: $1.85M average total cost of ransomware attack for businesses under 500 employees including ransom, downtime, recovery, and reputational damage.
$1.85M
Average total ransomware cost for businesses under 500 employees
Sophos State of Ransomware 2025
21 days
Average business downtime caused by ransomware attack
Coveware Q4 2024 Report
60%
Of SMBs close within 6 months after a ransomware attack
National Cybersecurity Alliance 2025
$570K
Average ransom payment for SMBs in 2025
Coveware Q4 2024 Report
Prevention Controls
Implement these controls to reduce your ransomware exposure. Prioritize based on your current gaps.
- Immutable off-site backups (3-2-1 rule: 3 copies, 2 media, 1 offsite)
- Email security: spam filtering, sandboxing, and anti-phishing training
- Network segmentation limiting ransomware's lateral movement
- Endpoint detection and response (EDR) with behavioral analysis
- Patch management: 60% of ransomware exploits known vulnerabilities with available patches
- Multi-factor authentication on all remote access and email
CyberStackHub Tools for Ransomware Risk
Identifies backup gaps, network segmentation weaknesses, and authentication deficiencies that ransomware exploits
Pre-plan your ransomware response — who to call, when to pay, how to isolate and recover
Phishing-resistant employees are your first line of defense against ransomware initial access
Documented backup, patch management, and remote access policies reduce your attack surface